[oi-dev] Specifying GCC as a compiler in a Makefile for simple library

[Denys Rtveliashvili]

Unfortunately CC = gcc did not work.
I figured it out at last. The correct incantation is:

COMPONENT_BUILD_ARGS += CC=gcc

That passes "CC=gcc" to the "make".

With kind regards,
Denys Rtveliashvili

> FWIW I have NEVER ever seen a makefile that used a variable named COMPILER.  Moreover, given that Gnu make supports C, C++ and several flavors of FORTRAN by default, it seems unlikely that COMPILER is used anywhere.  You can test that assertion by not setting COMPILER and adding an "@echo $COMPILER" line to the all target.
>
> I think you're misreading the make output.  It's referencing calling the linker.  The Gnu crowd like to have the compiler frontend do everything.  That's OK for single language packages, but doesn't work very well for a mixture of C++, C & FORTRAN.
>
> The normal makefile directive is:
>
> CC = gcc
>
> or
>
> CC = /my/path/gcc
>
> with the required tabs at the start of the rule.
>
> In any event, "CC=gcc make library" is unlikely to work.
>
> make library CC=gcc
>
> or make CC=gcc library
>
> are normal invocations of make.
>
> Hope this helps,
> Reg
>
> --------------------------------------------
> On Sun, 5/15/16, Denys Rtveliashvili <denys at rtveliashvili.name> wrote:
>
>   Subject: [oi-dev] Specifying GCC as a compiler in a Makefile for simple	library
>   To: "OpenIndiana Developer mailing list" <oi-dev at openindiana.org>
>   Date: Sunday, May 15, 2016, 6:19 PM
>   
>   
>     
>   
>       
>     
>     
>       Hello,
>   
>       
>   
>       I am trying to build a very simple library.
>   
>       That library has a Makefile and  the correct way to
>   build it on
>       Illumos would be to do this:
>   
>       
>   
>       CC=gcc make library
>   
>       
>   
>       So I wrote a Makefile for a oi-userland package with the
>   following
>       in it:
>   
>       
>   
>         COMPILER= gcc
>   
>       
>   
>       include
>   $(WS_MAKE_RULES)/prep.mk
>   
>         include $(WS_MAKE_RULES)/justmake.mk
>   
>         include $(WS_MAKE_RULES)/ips.mk
>       
>   
>       However, gmake build fails:
>   
>       
>   
>       symlink cloning
>        
>   /root/oi-userland/components/library/http-parser/http-parser-2.1
>         to
>   /root/oi-userland/components/library/http-parser/build/i86
>   
>         (cd
>   /root/oi-userland/components/library/http-parser/build/i86;
>         /usr/bin/env LD_OPTIONS="-M
>   /usr/lib/ld/map.noexstk -M
>         /usr/lib/ld/map.noexdata -M /usr/lib/ld/map.pagealign
>   -Bdirect -z
>         ignore" LD_EXEC_OPTIONS="-z
>   aslr=disable" CCACHE="/usr/bin/ccache"
>         CC_gcc_32="/usr/gcc/4.9/bin/gcc"
>         CC_gcc_64="/usr/gcc/4.9/bin/gcc"
>   CXX_gcc_32="/usr/gcc/4.9/bin/g++"
>         CXX_gcc_64="/usr/gcc/4.9/bin/g++"
>        
>   CCACHE_BASEDIR="/root/oi-userland/components/library/http-parser/build/i86"
>         /usr/gnu/bin/make  library)
>   
>         make[1]: Entering directory
>        
>   '/root/oi-userland/components/library/http-parser/build/i86'
>   
>         cc -I. -DHTTP_PARSER_STRICT=0  -Wall -Wextra
>   -Werror -O3
>         -fPIC -c http_parser.c -o libhttp_parser.o
>   
>         cc: -W option with unknown program all
>   
>       
>       
>   
>       So it is clear that it makes use of the
>   "COMPILER" variable,
>       otherwise it would not have had "CC_gcc_32" in
>   the messages.
>       However, it looks like it does not pass CC variable to
>   the Makefile
>       it eventually calls, so that Makefile is using the
>   default (and
>       incompatible) compiler.
>   
>       
>   
>       Please can you suggest something?
>   
>       
>   
>       With kind regards,
>   
>       Denys Rtveliashvili
>   
>     
>   
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